Same problem here although I didn’t spam anybody.
I wrote askimet but I didn’t get an answer.
Unbelievable that it’s so easy to block someone !
I found that “comment luv” can circumvent the problem.
Add your URL in the appropriate box, when the link retrieved by comment luv from your website appears under your comment, remove the website from the URL section and post. Askimet is not able to check the comment luv links it seems.